USN-2048-2: curl regression

Ubuntu Security Notice USN-2048-2

curl regression

A security issue affects these releases of Ubuntu and its
derivatives:

Ubuntu 12.10

Ubuntu 12.04 LTS

Ubuntu 10.04 LTS

Summary

USN-2048-1 introduced a regression in curl.

Software description

curl
- HTTP, HTTPS, and FTP client and client libraries

Details

USN-2048-1 fixed a vulnerability in curl. The security fix uncovered a bugin the curl command line tool which resulted in the --insecure (-k) optionnot working as intended. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Scott Cantor discovered that libcurl incorrectly verified CN and SAN name fields when digital signature verification was disabled. When libcurl is being used in this uncommon way by specific applications, an attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications.

Update instructions

The problem can be corrected by updating your system to the following
package version: